Example 7 : Limits
Limits allow you to enforce an arbitrary number of positioning limits on a layer.
These make it easy to ensure that dynamically positioned layers always stay
in an area that is acceptable for your design.

Example 9 : External source
The content of a layer can be populated and updated from an external URL.
In this example this content is shown inside the center layer.

Example 10 : Dynamic creation
Layers don't have to defined and described statically in a html page,
but can be created and destroyed dynamically at any moment and be used
in exactly the same way as a statically defined layer